Domains – Glossary of Terms

  Domains, Basic Information


The authorization password of a domain or some identifier, known only to the owner, used to authorize a transfer or other actions.

The Central Domain Registry

The main database of domain names, their holders and other data. The Central Registry is responsible for the administration of specific TLD. An example is the company CZ.NIC which is in charge of the Czech national domain .CZ.


Domain names are unique names of computers and servers on the Internet. They are linked to numerical values (IP address) through which computers communicate. The domain is easier for humans to remember than the numeric value. Domains can have multiple levels, which are separated by periods, such as the third-level domain


Information relating to it can be found in a separate article –


Technology which uses electronic signatures to authenticate the origin of data in DNS records. This prevents an attacker from substituting false DNS records and directing the domain to a fraudulent website. For further information visit


ICANN (Internet Corporation for Assigned Names and Numbers) is a nonprofit organization that is responsible for the DNS namespace, the distribution of large blocks of IP addresses, the management of autonomous system numbers, etc. It delegates the power to manage individual TLDs to other entities (registries).


Some domains may contain National Language characters (e.g. diacritics, Cyrillic, Greek and others). These domains are referred to as Internationalized Domain Names (IDNs).

Domain Owner

An individual or legal person which is the holder of a domain. 

Domain Transfer

The process by which it is possible to transfer a domain between registrars. This process may be different for different types of TLDs.


A domain registrar is empowered to manage their domains in the central register. They allow end-users (domain owners) to register and manage the domains. WEDOS Internet, a.s. is one of these registrars.

Name Server Set (NSSet)

At least 2 nameservers (with a technical contact who is authorized to manipulate the nameservers). These nameservers are used to specify which servers should return domain DNS records.


Top Level Domain – The domain listed at the end of the domain name. E.g. the Czech national domain (cz) in the name TLDs can be divided into several groups according to their meaning, for example, ccTLDs (Country code Top Level Domain), which are national or gTLDs (generic TLD) domains that are not associated with a specific state, but with a certain meaning (com, net, org, info, biz and others).


A service that provides information about domains, their contacts, name servers and other information associated with the domains.

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